selfupdate boost fail

[Thomas Nelson]

self update failed using boost.  Here's the tail end of the log:

:info:build
:info:build error: Configuration file user-config.jam not found in /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.                      
org_release_tarballs_ports_devel_boost/boost/work/boost_1_51_0 .
:info:build
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_boost/boost/work/      boost_1_51_0" && /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_boost/boost/work/boost_1_51_0/b2 -d2 --layout=tagged --debug-configuration --user-config=user-config.jam -sBZIP2_INCLUDE=/opt/local/include -sBZIP2_LIBPATH=/opt/local/lib -sEXPAT_INCLUDE=/opt/local/       include -sEXPAT_LIBPATH=/opt/local/lib -sZLIB_INCLUDE=/opt/local/include -sZLIB_LIBPATH=/opt/local/lib -sICU_PATH=/opt/local variant=release link=static,shared       architecture=x86 address-model=64 link=shared threading=multi
:info:build Exit code: 1
:error:build org.macports.build for port boost returned: command execution failed
:debug:build Error code: CHILDSTATUS 2985 1
:debug:build Backtrace: command execution failed
   while executing
"system -nice 0 $fullcmdstring"
   ("eval" body line 1)
   invoked from within
"eval system $notty $nice \$fullcmdstring"
   invoked from within
"command_exec build"
   (procedure "portbuild::build_main" line 8)
   invoked from within
"$procedure $targetname"
:info:build Warning: targets not executed for boost: org.macports.install org.macpkrts.build org.macports.destroot

What should I do?  Should I try reinstalling boost after a clean?